-ic bbb bbc bbe bbf bbi bbo bbs bbt bcb bcc bce bcf bci bco bcs bct be- beb bec bee bef bei beo bes bet bfb bfc bfe bff bfi bfo bfs bft bi- bib bic bie bif bii bio bis bit bob boc boe bof boi boo bos bot bsb bsc bse bsf bsi bso bss bst btb btc bte btf bti bto bts btt c-- cbb cbc cbe cbf cbi cbo cbs cbt ccb ccc cce ccf cci cco ccs cct ce- ceb cec cee cef cei ceo ces cet cfb cfc cfe cff cfi cfo cfs cft ci- cib cic cie cif cii cio cis cit co- cob coc coe cof coi coo cos cot csb csc cse csf csi cso css cst ctb ctc cte ctf cti cto cts ctt ebb ebc ebe ebf ebi ebo ebs ebt ec- ecb ecc ece ecf eci eco ecs ect eeb eec eee eef eeo ees eet ef- efb efc efe eff efi efo efs eft eib eic eie eif eii eio eis eit eo- eob eoc eoe eof eoi eoo eos eot es- esb esc ese esf esi eso ess est etb etc ete etf eti eto ets ett fbb fbc fbe fbf fbi fbo fbs fbt fcb fcc fce fcf fci fco fcs fct feb fec fee fef fei feo fes fet ffc ffe fff ffi ffo ffs fft fib fic fie fif fii fis fit fob foc foe fof foi foo fos fot fsb fsc fse fsf fsi fso fss fst ftb ftc fte ftf fti fto fts ftt i-f ibb ibc ibe ibf ibi ibo ibs ibt icb icc ice icf ici ico ics ict ie- iec iee ief iei ies iet ifb ifc ife iff ifi ifo ifs ift iib iic iie iif iii iio iis iit io- iob ioc ioe iof ioi ioo ios iot is- isb isc ise isf isi iso iss ist itb itc ite itf iti ito its itt o-i ob- obb obc obe obf obi obo obs obt oc- ocb occ ocf oci oco ocs oct oeb oec oee oef oei oeo oes oet of- ofb ofc ofe off ofi ofo ofs oft oib oic oie oif oii oio ois oit oo- oob ooc oof ooi ooo oos oot os- osb osc ose osf osi oso oss ost ot- otb otc ote otf oti oto ots ott sbb sbc sbe sbf sbi sbo sbs sbt scb scc sce scf sci sco scs sct se- seb sec see sef sei seo ses set sfb sfc sfe sff sfi sfo sfs sft sib sic sie sif sii sio sis sit sob soc soe sof soi soo sos sot ss- ssb ssc sse ssf ssi sso sss sst stb stc ste stf sti sto sts stt tbb tbc tbe tbf tbi tbo tbs tbt tcb tcc tce tcf tci tco tcs tct te- teb tec tee tef tei teo tes tet tfb tfc tfe tff tfi tfo tfs tft tib tic tie tif tii tio tis tit to- tob toc toe tof toi too tos tot tsb tsc tse tsf tsi tso tss tst ttb ttc tte ttf tti tto tts ttt